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XR21B1421IL24TR-F

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P50
© 2014 Exar Corporation
XR21B1421
43 / 50 exar.com/XR21B1421
Rev 1B
Table 23: RTS, DTR Pin Bit Positions
Bit Description
7 PULL_U
0: disable pull-up resistor
1: enable pull-up resistor
6 PULL_D
0: disable pull-down resistor
1: enable pull-down resistor if pull-up is not enabled as well
5:3 Reserved
2:0 CONFIG
000: GPIO Input
001: GPIO Open drain output
010: GPIO Push-pull output
011: RTS, DTR Open drain output (default)
100: RTS, DTR Push-pull output
101 to 111: Reserved
If RTS or DTR function is selected, CTS or DSR function (respectively)
must also be selected and DSR and CTS function (respecively) must be
configured as GPIOs.
Table 24: CD Pin Bit Positions
Bit Description
7 PULL_U
0: disable pull-up resistor
1: enable pull-up resistor
6 PULL_D
0: disable pull-down resistor
1: enable pull-down resistor if pull-up is not enabled as well
5:2 Reserved
1:0 CONFIG
00: GPIO Input
01: GPIO Open drain output
10: GPIO Push-pull output
11: Re ser ve d
© 2014 Exar Corporation
XR21B1421
44 / 50 exar.com/XR21B1421
Rev 1B
Table 25: RI Pin Bit Positions
Bit Description
7 PULL_U
0: disable pull-up resistor
1: enable pull-up resistor
6 PULL_D
0: disable pull-down resistor
1: enable pull-down resistor if pull-up is not enabled as well
5 RMTWK
0: disable remote wakeup capability for RI pin
1: enable remote wakeup capability for RI pin. (Remote wakeup must be
enabled in SET_USB_CONFIG [Attributes] report 0x60.)
4:2 Reserved
1:0 CONFIG
00: GPIO Input (default)
01: GPIO Open drain output
10: GPIO Push-pull output
11: RI input
Table 26: UART_DATA Pin Bit Positions
Bit Description
7 PULL_U
0: disable Rx pull-up resistor
1: enable pull-up resistor
6 PULL_D
0: disable Rx pull-down resistor
1: enable pull-down resistor if pull-up is not enabled as well
5 RMTWK
0: disable remote wakeup capability for RX pin
1: enable remote wakeup capability for RX pin. (Remote wakeup must
be enabled in SET_USB_CONFIG [Attributes] report 0x60.)
4:2 Reserved
1:0 CONFIG
00: Reserved
01: TX Open drain output
10: TX Push-pull output
11: Re ser ve d
© 2014 Exar Corporation
XR21B1421
45 / 50 exar.com/XR21B1421
Rev 1B
Table 27: USB_STAT1 / USB_STAT2 Pin Configuration Bit Positions
Bit Description
7:5 Reserved
4:2 FXN
000: USB_STAT1 asserted high, USB_STAT2 low during either suspend
state or USB reset
001: SUSPEND: Asserted high when in USB suspend state
010: LOW_POWER: Asserted high when in USB suspend state or not
yet configured
011: BUS_RST: Asserted high when USB bus reset is asserted
100: same as "000"
101: SUSPEND#: Asserted low when in USB suspend state
110: LOW_POWER#: Asserted low when in USB suspend state or not
yet configured
111: BUS_RST#: Asserted low when USB bus reset is asserted
1:0 CONFIG
00: Reserved
01: USB_STAT1/2 Open drain output
10: USB_STAT1/2 Push-pull output
11: Re ser ve d
Table 28: SUSPEND_STATE Bit Positions
Bit GPIO/Pin Pin Name
15:14 Reserved
13 9 GPIO9/DSR#
12 8 GPIO8/DTR#
11 7 GPIO7/RI#
10 6 GPIO6/CD#
9:8 Reserved
75GPIO5/RXT
64GPIO4/TXT
5:4 Reserved
3 3 GPIO3/RS485
22GPIO2/CTS#
11GPIO1/RTS#
00GPIO0/CLK
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P50

XR21B1421IL24TR-F

Mfr. #:
Buy XR21B1421IL24TR-F
Manufacturer:
MaxLinear
Description:
I/O Controller Interface IC 1 CH FS USB UART with HID
Lifecycle:
New from this manufacturer.
Delivery:
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